期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 6, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2008/06/012
关键词
dark matter simulations; dark matter
资金
- National Research Foundation of Korea [52314001] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Weakly interacting massive particles ( WIMPs) are one of the leading candidates for dark matter. We develop a model-independent method for determining the mass m. of the WIMP by using data ( i.e. measured recoil energies) of direct detection experiments. Our method is independent of the as yet unknown WIMP density near the Earth, of the form of the WIMP velocity distribution, as well as of the WIMP-nucleus cross section. However, it requires positive signals from at least two detectors with different target nuclei. In a background-free environment, m(chi) similar to 50 GeV could in principle be determined with an error of similar to 35% with only 2 x 50 events; in practice, upper and lower limits on the recoil energy of signal events, imposed to reduce backgrounds, can increase the error. The method also loses precision if m(chi) significantly exceeds the mass of the heaviest target nucleus used.
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